From: Michael Zoran Date: Fri, 28 Oct 2016 17:58:13 +0000 (-0700) Subject: staging: vc04_services: call sg_init_table to init scatterlist X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=dc5424ae0be4409019bafc303720d8a33f5b23fe;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git staging: vc04_services: call sg_init_table to init scatterlist Call the sg_init_table function to correctly initialze the DMA scatterlist. This function is required to completely initialize the list and is mandatory if DMA debugging is enabled in the build configuration. One of the purposes of sg_init_table is to set the magic "cookie" on each list element and ensure the chain end is marked. Signed-off-by: Michael Zoran Acked-by: Eric Anholt Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c index 12938f2898a7..70807577641d 100644 --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c @@ -453,6 +453,12 @@ create_pagelist(char __user *buf, size_t count, unsigned short type, pagelist->type = type; pagelist->offset = offset; + /* + * Initialize the scatterlist so that the magic cookie + * is filled if debugging is enabled + */ + sg_init_table(scatterlist, num_pages); + /* Now set the pages for each scatterlist */ for (i = 0; i < num_pages; i++) sg_set_page(scatterlist + i, pages[i], PAGE_SIZE, 0);